Picture of a plug and a outlet captioned: "It's simple. Male. Female. Not both. Not a 3rd option. Any questions?" Below:"[laughs in Electrician]" Picture of various different plugs and outlets
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[–] 18 points 1 year ago

The outer contact is ground, the inner pin is for locating (unconnected) and the other three are X, Y, Z. It's a Nema SS22-50R.

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